413
FNCA52 TJSJ 060737
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
337 AM AST FRI FEB 6 2026
DISCUSSION
A HIGH PRESSURE SYSTEM OVER THE EASTERN ATLANTIC AN ITS INTERACTION
WITH AN APPROACHING FRONTAL BOUNDARY OVER THE WESTERN ATLANTIC WILL
PROMOTE SOUTHERLY TO SOUTHWESTERLY WINDS AT AROUND 10 TO 13 MPH
TODAY, BELOW THE CRITICAL THRESHOLD. THE KBDI INDEX IN GUANICA
REDUCED TO 498 WITH RECENT RAINFALL ACTIVITY, WHILE CABO ROJO AND
CAMP SANTIAGO REMAIN ABOVE THE THRESHOLD, 649 AND 559, RESPECTIVELY.
TODAY AND EARLY SATURDAY, A DRIER THAN USUAL AIRMASS IS EXPECTED
TO DOMINATE, RESULTING IN MINIMUM DAYTIME RELATIVE HUMIDITY VALUES
TO DROP NEAR CRITICAL LEVELS, PARTICULARLY ACROSS SOUTHERLY COASTAL
PLAINS OF PUERTO RICO, STAY VIGILANT.
PRZ014-070745-
SOUTHEAST COASTAL PLAINS-
337 AM AST FRI FEB 6 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 20 0 10
TEMP (24H TREND) 86 (+4) 66 (-5) 86
RH % (24H TREND) 53 (-13) 90 (-1) 57
WIND 20FT/EARLY(MPH) SW 9 NW 6 SW 11
WIND 20FT/LATE(MPH) SW 9 NW 6 SW 11
MIXING HGT(FT-AGL/MSL)4590 4150
TRANSPORT WND (MPH) SW 9 SW 5
VENT RATE (KT-FT) 36720 16600
DISPERSION 5 4
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-070745-
SOUTHERN HILLS-
337 AM AST FRI FEB 6 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 10 0 10
TEMP (24H TREND) 82 (+4) 63 (-6) 83
RH % (24H TREND) 63 (-15) 96 (+2) 61
WIND 20FT/EARLY(MPH) SW 9 W 8 SW 10
WIND 20FT/LATE(MPH) SW 9 W 8 SW 10
MIXING HGT(FT-AGL/MSL)4960 5840
TRANSPORT WND (MPH) SW 8 W 6
VENT RATE (KT-FT) 34720 29200
DISPERSION 5 4
DSI 6 1 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-070745-
NORTH COASTAL PLAINS-
337 AM AST FRI FEB 6 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 40 50
TEMP (24H TREND) 86 (+3) 66 (-3) 85
RH % (24H TREND) 60 (-14) 98 (0) 60
WIND 20FT/EARLY(MPH) NW 13 S 11 NW 13
WIND 20FT/LATE(MPH) NW 13 S 11 NW 13
MIXING HGT(FT-AGL/MSL)4600 4490
TRANSPORT WND (MPH) SW 8 W 7
VENT RATE (KT-FT) 32200 26940
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-070745-
NORTHERN HILLS-
337 AM AST FRI FEB 6 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 40
TEMP (24H TREND) 85 (+3) 64 (-3) 83
RH % (24H TREND) 59 (-14) 98 (-1) 61
WIND 20FT/EARLY(MPH) W 12 S 10 NW 12
WIND 20FT/LATE(MPH) W 12 S 10 NW 12
MIXING HGT(FT-AGL/MSL)5730 5760
TRANSPORT WND (MPH) SW 9 W 7
VENT RATE (KT-FT) 45840 34560
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-070745-
WEST COAST-
337 AM AST FRI FEB 6 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR CLEAR MCLEAR
PRECIP TYPE NONE NONE SHOWERS
CHANCE PRECIP (%) 0 0 10
TEMP (24H TREND) 85 (+1) 67 (-3) 85
RH % (24H TREND) 60 (-11) 96 (+2) 62
WIND 20FT/EARLY(MPH) SW 11 S 9 W 13
WIND 20FT/LATE(MPH) SW 11 S 9 W 13
MIXING HGT(FT-AGL/MSL)4210 4880
TRANSPORT WND (MPH) S 12 NW 8
VENT RATE (KT-FT) 42100 34160
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-070745-
EASTERN INTERIOR-
337 AM AST FRI FEB 6 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 40
TEMP (24H TREND) 85 (+5) 64 (-5) 84
RH % (24H TREND) 61 (-16) 99 (+2) 59
WIND 20FT/EARLY(MPH) SW 10 SW 9 NW 6
WIND 20FT/LATE(MPH) SW 10 SW 9 NW 6
MIXING HGT(FT-AGL/MSL)5960 6560
TRANSPORT WND (MPH) SW 8 W 2
VENT RATE (KT-FT) 41720 13120
DISPERSION 5 4
DSI 6 1 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-070745-
LUQUILLO MOUNTAIN RANGE-
337 AM AST FRI FEB 6 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 40 40
TEMP (24H TREND) 80 (+4) 63 (-5) 80
RH % (24H TREND) 70 (-13) 100 (+1) 65
WIND 20FT/EARLY(MPH) S 6 W 5 LGT/VAR
WIND 20FT/LATE(MPH) S 6 W 5 LGT/VAR
MIXING HGT(FT-AGL/MSL)4720 4850
TRANSPORT WND (MPH) SW 9 W 2
VENT RATE (KT-FT) 37760 9700
DISPERSION 5 3
DSI 6 1 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-070745-
CENTRAL MOUNTAIN RANGE-
337 AM AST FRI FEB 6 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 0 0 10
TEMP (24H TREND) 82 (+5) 61 (-5) 81
RH % (24H TREND) 61 (-15) 97 (-1) 63
WIND 20FT/EARLY(MPH) SW 11 SW 9 W 13
WIND 20FT/LATE(MPH) SW 11 SW 9 W 13
MIXING HGT(FT-AGL/MSL)6010 7170
TRANSPORT WND (MPH) SW 9 W 6
VENT RATE (KT-FT) 48080 35850
DISPERSION 5 4
DSI 6 1 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-070745-
CAYEY MOUNTAIN RANGE-
337 AM AST FRI FEB 6 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 20
TEMP (24H TREND) 80 (+4) 64 (-4) 80
RH % (24H TREND) 69 (-13) 99 (+2) 63
WIND 20FT/EARLY(MPH) SW 8 W 6 W 5
WIND 20FT/LATE(MPH) SW 8 W 6 W 5
MIXING HGT(FT-AGL/MSL)5290 5180
TRANSPORT WND (MPH) SW 10 W 3
VENT RATE (KT-FT) 47610 15540
DISPERSION 5 4
DSI 6 1 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-070745-
VIEQUES-
337 AM AST FRI FEB 6 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY MCLEAR CLEAR
PRECIP TYPE SHOWERS SHOWERS NONE
CHANCE PRECIP (%) 30 20 0
TEMP (24H TREND) 85 (+1) 70 (-3) 85
RH % (24H TREND) 61 (-4) 96 (+3) 57
WIND 20FT/EARLY(MPH) SW 11 SW 11 LGT/VAR
WIND 20FT/LATE(MPH) SW 11 SW 11 LGT/VAR
MIXING HGT(FT-AGL/MSL)2760 2400
TRANSPORT WND (MPH) SW 13 NW 1
VENT RATE (KT-FT) 30360 2400
DISPERSION 5 3
DSI 6 1 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-070745-
CULEBRA-
337 AM AST FRI FEB 6 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY CLEAR
PRECIP TYPE SHOWERS SHOWERS NONE
CHANCE PRECIP (%) 30 30 0
TEMP (24H TREND) 85 (+1) 72 (-3) 85
RH % (24H TREND) 63 (-5) 94 (+4) 58
WIND 20FT/EARLY(MPH) S 11 SW 11 LGT/VAR
WIND 20FT/LATE(MPH) S 11 SW 11 LGT/VAR
MIXING HGT(FT-AGL/MSL)2700 2380
TRANSPORT WND (MPH) SW 13 N 2
VENT RATE (KT-FT) 29700 4760
DISPERSION 5 3
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-070745-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
337 AM AST FRI FEB 6 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR CLEAR MCLEAR
PRECIP TYPE SHOWERS NONE NONE
CHANCE PRECIP (%) 10 0 0
TEMP (24H TREND) 87 (+3) 67 (-5) 87
RH % (24H TREND) 50 (-12) 94 (+6) 56
WIND 20FT/EARLY(MPH) SW 10 W 6 W 13 G17
WIND 20FT/LATE(MPH) SW 10 W 6 W 13 G17
MIXING HGT(FT-AGL/MSL)4430 5400
TRANSPORT WND (MPH) SW 8 W 8
VENT RATE (KT-FT) 31010 37800
DISPERSION 5 4
DSI 6 1 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-070745-
SAINT THOMAS AND SAINT JOHN-
337 AM AST FRI FEB 6 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 10
TEMP (24H TREND) 85 (+2) 71 (-5) 85
RH % (24H TREND) 63 (-6) 97 (+6) 57
WIND 20FT/EARLY(MPH) S 10 S 10 LGT/VAR
WIND 20FT/LATE(MPH) S 10 S 10 LGT/VAR
MIXING HGT(FT-AGL/MSL)3190 2750
TRANSPORT WND (MPH) SW 12 W 5
VENT RATE (KT-FT) 31900 11000
DISPERSION 5 4
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-070745-
ST CROIX-
337 AM AST FRI FEB 6 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 50 40
TEMP (24H TREND) 86 (+2) 71 (-4) 86
RH % (24H TREND) 63 (-3) 94 (+3) 58
WIND 20FT/EARLY(MPH) S 9 S 6 SW 5
WIND 20FT/LATE(MPH) S 9 S 6 SW 5
MIXING HGT(FT-AGL/MSL)4040 4010
TRANSPORT WND (MPH) S 10 W 7
VENT RATE (KT-FT) 36360 24060
DISPERSION 5 4
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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